Foot control accessory for drill presses



y 6, I I FRIED 2,444,562

FOO'LI. CONTROL ACCESSORY FOR DRILL PRESSES Filed July 28, 1944 2Sheets-Shet 1 INVENTOR. way/y W/Zw ATTORNEYS J. W. FRIED FOOT CONTROLACCESSORY FOR DRILL PRESSES July 6, 1948.

2 Sheets-Sheet 2 Filed July 28, 1944 AT RNEYS Patented July 6, 1948UNITED STATES PATENT oFFlcE FOOT CONTROL ACCESSORY FOR DRILL PRESSESJoseph W. Fried, Los Angeles, Calif. Application July 28, 1944, SerialNo. 547,052

(Cl. TY-30) 2 Claims. 1

This invention relates to a device for mounting a burring or chamferingtool and to a mechanism for operating the same.

An object of the invention is to provide a device on which a burring orchamfering tool can be conveniently mounted and power-driven and toprovide a foot-operated mechanism for operating the burring tool so thatthe operator is free to use both hands in applying the work to the tooland removing it therefrom.

Another object of the invention is to provide a bracket applicable tothe quill of a drill press or similar construction on which a yoke ispivotally mounted that is adapted to be operatively connected to theoperating collar of a burring tool or similar device that is adapted tobe mounted on the spindle and to provide a construction whereby the yokemay be readily connected to or disconnected from the operating collar ofthe tool to facilitate removal and replacement of the tool.

With the foregoing and other objects in View, which will be mademanifest in the following detailed description and specifically pointedout in the appended claims, reference is had to the accompanyingdrawings for an illustrative embodiment of the invention, wherein:

Figure 1 is a perspective view illustrating the apparatus embodying thepresent invention and the manner in which it is used;

Fig. 2 is a partial view in side elevation, parts being broken away andshown in section illustrating details of construction;

Fig. 3 is a sectional View taken substantially upon the line 3-3 uponFig. 2 in the direction indicated.

Referring to the accompanying drawings wherein similar referencecharacters designate similar parts throughout, the present inventionrelates to a mechanism for mounting and oper-, ating a rotary tool suchas the tool disclosed in United States Letters Patent No. 2,314,084,issued March 16, 1943, to Armin Fried. Such a tool, as illustrated inFig. 2, consists of a cylindrical shank 10 the upper end of which isadapted to be mounted in a chuck H which, in turn, is mounted on aspindle 12 that is rotatable within a quill 13. Within the shank In ofthe tool there is a cutter M which can be advanced or projected beyondthe sides of the shank or may be retracted to assume a position whollywithin the general cylinder defined by the surfaces of the shank. Thecutter I4 is advanced and retracted by a collar l5 which is grooved asat I5a. so that when the collar is forced downwardly as viewed in Fig.2, the cutter is advanced and when the collar is lifted upwardly thecutter [4 is caused to retract.

By means of the burring tool as above described, the shank It may beinserted in a drilled hole while the cutter is in retracted position andthe cutter after having passed through the hole, may then be projectedand brought into engagement with the edges of the hole to remove burrsthat may be left as a result of the drilling operation. After the burrshave been removed the cutter can then be retracted and the work slippedoff of the shank.

The present invention comprises a means for suitably mounting the tooland operating it so that the operator may use both hands in applying thework indicated at W to the shank Ill and removing it therefrom. Itconsists of a suitable base 16 on which there is a column [1 equippedwith an adjustable clamp it. A second clamp i9 is connected to clamp 18so as to be rotatably adjustable relatively thereto. This clamp isadapted to clampon the stem of the column 20 of a drill press or similarpowerdriven piece of equipment having for example an electric motor 2iand an adjustable belt drive 22 that connects the motor with a spindlel2 so as to rotate it. By loosening the clamps I8 and Hi the stem 2a andits associated structure may be raised or lowered on the column I1 andswung or tilted in any position suitable to the operator.

A feature of the invention relates to the construction employed to shiftthe position of the collar 15 so as to advance and retract cutter l4.

This consists of a suitable bracket or clamp 22a adapted to be clampedabout the quill [3. on this bracket there is adjustably mounted a bar 23that is held in adjusted position, such as by set screws 24. On the endof the bar there is secured a clevis 25 between the sides of which thereextends a shiftable pin 26 constituting a pivot pin for a yoke 27 thearms of a which, indicated at 28, extend around the collar 15. Studs 29are mounted on the arms of the yoke and extend into the groove 15a.Screws 30 are mounted on the clevis on opposite sides of the pin 26 andare engageable with the yoke to limit pivoting movements of the yoke 21about the pin 26 as a center. A tension spring 3| connects the yoke withbracket 22a urging the yoke into that position wherein collar mostposition and cutter I4 is retracted. The outer end of the yoke has acable 32 secured thereto which is trained over a pulley 33 mounted I5 isin its upperin a suitable carrier 34 that may be pivoted or otherwiseadjustable upon bracket 22a. This cable then extends downwardly and isconnected to a treadle 35 that is pivotally mounted upon a base 36.

As will be noted from an inspection of Fig. 3, pin 26 has a handle 36and has portions of two diameters, one portion being indicated at 31that is arrangedtos substantially fit the-large end 38 of slot 39. Theportioniof reduced diameter, indicated at 40, is of such a size as toextend through the narrow portion of the slot 39. Thus, when the largeportion 31 is occupying the large end of the slot the yoke 21? maymerely'pivot about pin 26 as a center. However, in order to remove andreplace the burring-tool by withdrawing pin 36 sufficiently so that thereduced portion 40 extends across the slot,yoke 21 may be caused toslide on pin 26 the length of the slot which disconnects the yoke fromthe collar l and moves it 'suffi ciently so that; the burning toolcanberrremoved from the chuck and replaced. When the bulrlng tool.is.rep1aced the yoke is oausedto. slide-.on pin-26from left. to right,as viewedainEig. 2,.after which the pin 26 is pushed rearwandlyuntil-the enlarged portion3'l is again occupyin and fitting the largeend 38 or the slot 39. ,(In: this -way,..a' burringtool that may havebecome dulled cantbe easily and quickly removed and :replaced withoutdisturbing adjustment .of the yokepits operating cable, .andits limitingstopssafiorded by screws 30.

In some instances, the burring tool is mounted directly ..on,the spindleof=a conventional drill press in which. event bracket 22a may be clampedabout the guill ofthe drill press and the cable 32, latter-being trailedaround pulleyt33, may be trained .over additional pulleys that arefastened on thedrill press table and then led to the treadle 3-5.

iFrom,theabove-described construction it will beiappreciated thattheoperator can readily employ'both hands .to .apply the work W to theshank). Spring 3i .will normallymaintain the parts -.in that positionwherein cutter i4 is retracted. :After the work has been slipped ontothe .shank the treadle-isdepressed which causes the yokeiflto swing,shifting collar [5 to a position wherein-cutter. Ill is advanced orprojected. The,.,worklm then .beslidon the shank to the requiredposition .for removing burrs or chamfering and upon release of thetreadle 35 springiiii willreturn the parts intocutter-retract-ingposition. .IIhereafter, the work may be removed.

.Narious changes ,mayebe made in the details of constructionw1thout-departing from the spirit .eters andthe yoke having a and scopeof the invention as defined by the appended claims.

I claim:

1. A device of the class described comprising a base having a column, apower driven machine having a quill and a spindle adjustably mountedupon the column, a bracket attachable to the quill, a stem on thebracket, a yoke pivotally mounted upon the stem, at treadle,. and acable connecting the yoke to the treadle so as to be operable thereby,the pivotal connection being provided by a pin having portions of twodiamslot therethrough of varying sizes one portion of which receivesthat portion of the pin which is of larger diameter andthe remainder ofthe slot receiving that portion of the pin which is of smaller diameterwhereby the yoke may be optionally caused to pivot relatively to thestem or may be slid relatively thereto laterally with respect to thequill to disengage the tool which it operates to permit replacement.

2. A device of the class described comprising a base having a. column, apower driven machine having a quill and a spindle adjustably mountedupon the column, a :bracket attachable to the quill, a stem'on thebracket, va yoke pivotally mounted upon-the stem, a treadle, a cableconnecting theyoke tothe'treadle so as to be operable thereby, thepivotal connection being provided bya-pin having portions of twovdiameters and theyoke having -a slot therethrough of varyil'lg sizes oneportion of which receivesthatportionof the pin which is of largerdiameter and the remainder of the slot receiving that portion of the pinwhich is of smaller diameter whereby theyoke maybe optionally-causedtopivot relatively. to the stem or may be slid relativelytheretolateraily-with respect to said quill to disengage the tool whichit-operates to permit replacement, and spring means connecting theyokeand the bracket urgingthe yoke into a: normal position.

JOSEPH W. FRIED.

iREFERENCES CITED The following references are of recordin the file ofthis patent:

:UNITED STATES PATENTS

